DoubleTake Software

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Double-TakeSolutions for High Availability and
Disaster Recovery Waleed Samy Senior Data
Protection Consultant wsamy_at_e-softcommerce.com M
ob. 2 0125092228
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Agenda for Today

• Who is Double-Take Software?
• The need for HA and DR
• What solutions do exist today?
• Introducing Double-Take
• Solutions overview and virtualization of DR sites
• Virtual Demo Double-Take for Exchange / SQL
  Server
• QA

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Who is Double-Take Software?

• Founded in 1991 in USA as NSI Software
• Based in Indianapolis and New Jersey
• Acquired Sunbelt System Software Europe in May
  2006 (this does NOT include Sunbelt Software
  Distribution in the USA)
• Launched Double-Take in 1996
• Offices in US, France, UK, Sweden, Germany,
  Belgium (Brugge), DUBAI
• 120000 licenses in production today

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The Business Issues Why?

• Increased reliance on ICT
• Effective 24x7 opening hours (e-Commerce)
• Applications Data are now important
• e-Mail ERP are mission critical
• Big projects are finished So..
• What about High Availability?
• What about Disaster Recovery?
• Windows is increasingly present and strategic
  within the company
• 85 of the servers used by these customers are
  Microsoft driven
• Downtime is not an option
• Risk Assessment investors, reputation, lost of
  sales, loosing customers

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Increased Compliance Pressures

• Small Companies
• Even small companies have compliance needs
• Companies act, Financial Services, Gaming etc
• Going concern audit assessments
• Enterprise
• Services obligations
• Government
• Industry
• Basel II for financial sector
• PharmaceuticalsWe have to maintain the
  availability of our systems.While there is a
  cost to doing so so there is a cost in not
  doing so!

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Causes of non-availability

• Server crashes
• Hardware or software
• Theft of servers
• Fire, Flood Explosions
• Electricity Black-outs
• Terrorism
• Natural Disasters
• Human Errors

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Statistical Causes of System Failure
Source Consolidated Analyst Reports - IDC,
Gartner, Forrester
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Definition High Availability

• Goal make systems more available to clients
  (reduce downtime) by providing higher user access
  to services and applications
• Design guidelines
• Some form of failover is required
• Same quality of service to clients after failover
• Note failover is transparent to users and
  applications

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Definition Disaster Recovery

• Goal protect against site failure caused by
  natural disasters, site loss, power outage by
  keeping an off-site copy of mission critical data
• Design guidelines
• Switched / controlled failover
• Different sites or locations (WAN links)
• Note Remote Availability HA over WAN

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Definition RTO and RPO

• RTO Recovery Time ObjectiveTime needed to
  restore the data (seconds, hours, days)
• RPO Recovery Point ObjectiveTo which point in
  time do we restore the data (how much data loss?)

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Solutions we know today

• Backup long restore time (RTO), data is already
  obsolete at moment of restore (RPO)
• Microsoft Cluster hardware specific, , HA
  solution only, cluster-aware applications,
  Enterprise Editions only
• SAN replication high bandwidth, specific
  storage,
• File copy tools (Robocopy, FRS) does not work
  with production data (open files), scheduled, low
  performance

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Double-Take / MSCS differences
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Introducing Double-Take

• Real-time Data ProtectionAllows real-time
  byte-level open file replication of data changes
  from a production to a backup machine
• Automatic Server FailoverAllows a backup server
  to stand in for a primary server in the event of
  a failure
• Advanced MonitoringFull support of all
  monitoring standards (SNMP, SMTP) and integration
  with MOM

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Double-Take Components

• DoubleTake for WindowsRuns on all Windows
  Server platforms Server, Enterprise, Datacenter,
  Storage Server Edition (NT 4.0 -gt Windows 2003
  Windows 2008)Virtual Systems are also
  supportedDouble-Take for Linux
• Software-OnlyDouble-Take is host-based
  replication, no requirement for specific hardware

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Replication Process
STAR Technology Sequential Transfer Asynchronous
Replication
Its the same data in the same order !
Data Consistency
Application
487
. . . . . . . . . .
Operating System
File System
File Operation 326 Path File
SOME.DOC Operation Write Start 1720
bytes Length 120 bytes Data Some
Data Checksum A923D0F2
328
D\SERV1\MyData
327
Hardware Layer
326
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Replication Process
Any IP Network(LAN / WAN)
File Operation 326 Path d\MSSQL\LOGS\ File
EMPLOYEES.LDF Operation Write Start 1720
bytes Length 12 bytes Data 512-555-1212 Chec
ksum A923D0F2
Hardware and Application independent
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Replication Process
Primary Double-Take Server
Backup Double-Take Server
TCP/IP Network
Step 1 Application writes data to file. It is
also captured by the Double-Take filter driver on
the primary server
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Replication Process
Primary Double-Take Server
Backup Double-Take Server
TCP/IP Network
Step 2 Double-Take transmits the data over the
TCP/IP network (LAN / WAN) to the backup server
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Replication Process
Primary Double-Take Server
Backup Double-Take Server
TCP/IP Network
Step 3 A copy of the data is written to the disk
on the backup server
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Connection Features
Primary Double-Take Server
Backup Double-Take Server
TCP/IP Network
STAR Technology with options for scheduling,
compression (3 levels on/off) and bandwidth
limiting / scheduling tune Double-Take for your
particular network requirements!
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Failover Process

• Client writes data to Server1 (source machine)

Client

• Source machine replicates to target machine in
  real-time, target machine monitors source machine

• Source machine fails

Server2 10.0.0.12
Server1 10.0.0.11

• Target machine detects failure and takes on
  server name and IP address of source machine

Server110.0.0.11

• Target machine runs failover scripts, restarting
  Server 1 applications

• Users resume work

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Failover Process Many To One
Production (source) Servers
FS1 DB
10.9.9.1
WWW Services started
10.9.9.2
FS2
DB Services started
Redundant (target) Server
FS3 WWW
10.9.9.3
FSDT
10.9.9.252
FS4
10.9.9.4
FS5 File
10.9.9.5
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Double-Take Solutions
Great, but what can we do with Double-Take?
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One to One
One machine is a dedicated backup for high
availability(Active Passive)
WAN
WAN
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One to One
Both machines may be providing high availability
for each other(Active Active)
WAN
WAN
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Disaster Recovery
Send data to an off-site location
WAN
WAN
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One to Many
Send data to multiple locations from a single
source. Provide data distribution
WAN
WAN
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Many to One
Centralize data from multiple source servers to
asingle target server
WAN
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Centralized Backup
Centralize data from multiple source servers to a
single target server for backup
WAN
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Local HA and Remote DR
Send data to an off-site location
WAN
WAN
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Double-Take Flexibility
The possibilities with Double-Take are
nearly limitless!
WAN
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Double-Take Solutions

• One-to-One
• One-to-Many
• Many-to-One
• Many-to-Many
• Centralized Backup
• Chained
• Same server (C\ to D\)

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Double-Take Solutions
Other Solutions

• Testing or migration
• Application and service pack testing
• Local disk migration
• Server hardware migration
• Scheduled maintenance coverage
• Disaster Recovery for MSCS
• Source and target server do not need identical
  hardware
• Full scripting with DTCL commands (version 5.0
  VBScript)

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Double-Take Solutions
Supported Applications

• File and Print Servers
• SQLServer 7.0, 2000 and 2005
• Exchange Server 5.5/2000/2003/2007
• IIS and SharePoint Server
• Oracle, Sybase, DB2, Informix
• Virtual Systems
• And a lot more! DoubleTake is Application-Independ
  ent.

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Double-Take and Virtual Systems
One to One HA
FS1
FS1
EXCHANGE
EXCHANGE
FS2
FS2
SQL
SQL
WWW
WWW
Virtual Machines
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Double-Take and Virtual Systems
One to One DR
FS1
FS1
SQL
SQL
WAN
EXCHANGE
EXCHANGE
FS2
FS2
WWW
WWW
Virtual Machines
Virtual Machines

• HA and DR solutions
• Full failover capabilities for all virtual
  sessions
• LAN WAN support for regional DR protection
• Lower TCO with minimized hardware requirements

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Double-Take and Virtual Systems
Many to One DR
FS1
WAN
SQL
EXCHANGE
FS2
WWW
Virtual Machines
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Double-Take Application Manager
Virtual Demo
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Double-Take Application Manager
DTAM "Virtual Demo"

• Evolution of application protection strategy
• Takes application protection to the next level
• Unified framework for application protection
  configuration, monitoring and management
• Simplifies and automates Double-Take protection
  of business-critical applications

• One Solution Multiple Applications
• Application-Independent
• Available to customers at no additional charge

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Exchange Availability with DTAM
DTAM "Virtual Demo"
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Exchange Availability with DTAM
DTAM "Virtual Demo"
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DTAM Virtual Demo
DTAM "Virtual Demo"

• First, select the Active Directory Domain where
  Exchange is installed.
• Second, Select the Source Exchange server from
  the drop-down list.

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DTAM Virtual Demo
DTAM "Virtual Demo"

• Next, Select the Target Exchange server from
  the drop-down list.

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DTAM Virtual Demo
DTAM "Virtual Demo"

• Optionally, you can click the Configure
  Protection button to configured advanced options.

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DTAM Virtual Demo
DTAM "Virtual Demo"

• The Configure button in the Failover Type
  section allows you to configure advanced failover
  options for DNS.

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DTAM Virtual Demo
DTAM "Virtual Demo"

• In the advanced failover options dialog, you can
  configure which addresses to monitor and can
  specify credentials that should be used for
  updating DNS.

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DTAM Virtual Demo
DTAM "Virtual Demo"

• By default, all required Exchange services are
  failed over to the secondary server. If
  additional services are required to support
  solutions like virus protection or mobile access,
  they can be added by selecting them from a
  drop-down list.

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DTAM Virtual Demo
DTAM "Virtual Demo"

• On the Connection tab, you can specify settings
  such as replication route, mirror type and
  compression.
• You can also select which Exchange storage groups
  should be protected by replication and failover.

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DTAM Virtual Demo
DTAM "Virtual Demo"

• The Advanced tab can be used to configure
  specialized settings for your environment i.e.,
  adding additional dataset to be replicated.

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DTAM Virtual Demo
DTAM "Virtual Demo"

• DTAM v4.1 includes a feature called
  Configuration Cloning which will make any
  necessary changes to the secondary Exchange
  servers configuration

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DTAM Virtual Demo
DTAM "Virtual Demo"

• The Validate button will run a Pre-Flight
  check before protection is enabled.

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DTAM Virtual Demo
DTAM "Virtual Demo"

• If there are problems with Exchange or
  Double-Take, they will be listed. Click Fix
  All to repair.

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DTAM Virtual Demo
DTAM "Virtual Demo"

• Once validation is complete, click Enable
  Protection.

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DTAM Virtual Demo
DTAM "Virtual Demo"

• Mirroring of the protected Exchange data will be
  started.

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DTAM Virtual Demo
DTAM "Virtual Demo"

• Once mirroring is complete, protection, Exchange
  is protected.

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DTAM Virtual Demo
DTAM "Virtual Demo"

• Failover can be initiated manually by clicking
  the Failover button.

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DTAM Virtual Demo
DTAM "Virtual Demo"

• The type of failover can be selected either
  Immediate or Graceful.

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DTAM Virtual Demo
DTAM "Virtual Demo"

• Failover beginsthe current status is reported at
  the bottom of the console.

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DTAM Virtual Demo
DTAM "Virtual Demo"

• When failover is complete, the Protection and
  Failover and Monitoring status areas will be
  updated.

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DTAM Virtual Demo
DTAM "Virtual Demo"

• ExchFailover.log provides details about
  the failover process.

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DTAM Virtual Demo
DTAM "Virtual Demo"

• When the Source server is repaired, click
  Failback.
• Select Failback options and then click Initiate
  Failback.

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DTAM Virtual Demo
DTAM "Virtual Demo"

• Once failback is complete, protection can
  automatically be resumed or it can be configured
  again using the setup tab of Exchange Manager.

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DTAM Virtual Demo support for SQL
DTAM "Virtual Demo"

• The Advanced tab can be used to configure
  specialized settings
• It also allows you to choose a protection mode
  for SQL. The default setting of SQL Instance
  will protect all user and system databases.

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DTAM Virtual Demo support for SQL
DTAM "Virtual Demo"

• If the protection mode is set to Database
  Only, you can select which user databases are to
  be protected.
• In Database Only mode, the path to which the
  user databases are replicated can also be changed.

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Double-Take Snapshot Feature Pack
Integration with VSS from Double-Take
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Disaster Recovery for MSCS
Adding DR to MSCS
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DR for MSCS
MSCS Nodes
Double-Take
Double-Take
Replication from Node 1
Double-Takefor DR
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DR for MSCS
MSCS Nodes
X
Double-Take
Double-Take
Replication from Node 2
Double-Takefor DR
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DR for MSCS
MSCS Nodes
X
X
X
Double-Take
Double-Take
Data available via Double-Takes Failover,
including virtual server name and IP address!
Double-Take Failover Network Name IP
Address File Share
Double-Take
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In het kader van hun Business Continuity Plan
hebben volgende bedrijven reeds voor Double Take
gekozen

• Internationale kamer van koophandel
• De Lijn
• Nationale loterij
• Estee Lauder
• ING Direct
• General Electric
• Nuon
• ABN AMRO
• Nestlé
• Buffalo Grill
• Laboratoiria Clarins
• SACEM
• France Telecom
• Creyfs Group
• Randstad
• Vrije universiteit Brussel
• Provinciebestuur Limburg
• Handicap International
• Banden de Condé

• Central Europe Bank (ECB)
• KPMG
• Powernext
• Banque Privée De Edmond Rothschield
• Europeese Commisie
• NATO
• Carrefour
• NEC
• Alcatel
• TELE 2
• Brinks
• Belgacom
• Pfizer
• Dassault Falcon Services
• 3 Suisses
• Danone
• Vandemoortele
• Johnson Johnson
• College of Europe

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Questions and Answers

• More info on Double-Take
• www.doubletake.com